Real-time simulations¶. Sometimes, you might not want to perform a simulation as fast as possible but synchronous to the wall-clock time. This kind of simulation is also called real-time simulation. Real-time simulations may be necessary. if you have hardware-in-the-loop,; if there is human ...

No pypy vs. pypy3 benchmarks yet, but pypy is faster than cpython if your simulation is not too small (e.g., the tests run slower on pypy than on cpython because we use a lot of small processes that only run once).﻿

- [NEW] Verified, that SimPy works on Python 3.4.- [NEW] Guide to SimPy events- [CHANGE] The result dictionary for condition events (``AllOF`` / ``&`` and ``AnyOf`` / ``|``) now is an OrderedDict sorted in the same way as the original events list.- [CHANGE] Condition events now also except processed events.- [FIX] ``Resource.request()`` directly after ``Resource.release()`` no longer successful. The process now has to wait as supposed to.- [FIX] ``Event.fail()`` now accept all exceptions derived from ``BaseException`` instead of only ``Exception``.﻿

“I came across SimPy a couple of days ago and love it very much. The simplicity and expressive capabilities are unparalleled!

[…]

Overall, I must say I have never seen something similar to SimPy. This framework allows to write simulation models in such a clean style that a graphical editor becomes obsolete. Models expressed with SimPy are pure beauty!” —Andreas Beham﻿

Shared Resources¶. Shared resources are another way to model Process Interaction. They form a congestion point where processes queue up in order to use them. SimPy defines three categories of resources: Resources – Resources that can be used by a limited number of processes at a time (e.g., ...

Sleep until woken up¶. Imagine you want to model an electric vehicle with an intelligent battery-charging controller. While the vehicle is driving, the controller can be passive but needs to be reactivate once the vehicle is connected to the power grid in order to charge the battery.

Event basics¶. SimPy events are very similar – if not identical — to deferreds, futures or promises. Instances of the class Event are used to describe any kind of events. Events can be in one of the following states. An event. might happen (not triggered),; is going to happen (triggered) or ...

SimPy is a process-based discrete-event simulation language based on standard
Python and released under the GNU LGPL.

It provides the modeller with components of a simulation model. These include
processes for active components like customers, messages and vehicles as well
as resources for passive components that form limited capacity congestion
points (like servers, checkout counters and tunnels). It also provides monitor
variables to aid in gathering statistics.

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